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Additional SourceSpecDefinition validations #2914

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merged 13 commits into from
Jan 24, 2024

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@benjamn benjamn commented Jan 23, 2024

Follow-up to PR #2910.

@benjamn benjamn self-assigned this Jan 23, 2024

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@benjamn benjamn marked this pull request as ready for review January 23, 2024 18:27
@benjamn benjamn requested review from a team as code owners January 23, 2024 18:27
if (result.sourceAPI || result.sourceType || result.sourceField) {
// Since this subgraph uses at least one of the @source{API,Type,Field}
// directives, it must also use v2.7 or later of federation.
if (!federationVersion || federationVersion.lt(this.minimumFederationVersion)) {
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I don't think this error is necessary. I think it's fine to just not validate rather than throw an error. Not sure that this could ever happen.

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Without this enforcement, there's a cryptic error later on because @join__directive isn't added to the supergraph schema unless federation v2.7+ is in use.

Specifically, joinDirective ends up undefined here:

const joinDirective = this.joinSpec.directiveDirective(this.merged);
Object.keys(joinsByDirectiveName).forEach(directiveName => {
joinsByDirectiveName[directiveName].forEach(join => {
dest.applyDirective(joinDirective, {

when it wasn't added to the schema here:
if (this.version.gte(new FeatureVersion(0, 4))) {
const joinDirective = this.addDirective(schema, 'directive').addLocations(
DirectiveLocation.SCHEMA,
DirectiveLocation.OBJECT,
DirectiveLocation.INTERFACE,
DirectiveLocation.FIELD_DEFINITION,
);

I agree with @lennyburdette that not using federation v2.7 is an easy mistake to make, and this error should make the problem easier to diagnose.

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All directives have an issue where if you don't specify the right version composition will say that it doesn't understand the directive. Not sure why this is a special case.

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because the source directives are imported from their own link instead of from the federation link. it's a little weird, but i'm ok with leaning into it because enforcing a minimum version of 2.7 should minimize the number of unhappy paths:

@link federation < 2.7 @link federation >= 2.7
composition < 2.7 using source is silently ignored (🦶🏻 🔫 , but can't fix) composition fails due to link being ahead of composition
composition >= 2.7 this scenario which we're disallowing happy path

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Ok, I got it. Can you make an issue to solve this for the general case? Might be a good starter project for our new hire.

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main has been updated, so you want to merge there rather than next (which is in theory 2.8 now).

@benjamn benjamn changed the base branch from next to main January 23, 2024 19:49
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@benjamn benjamn enabled auto-merge (squash) January 24, 2024 16:34
@benjamn benjamn merged commit 493f5ac into main Jan 24, 2024
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@benjamn benjamn deleted the benjamn/additional-SourceSpecDefinition-validations branch January 24, 2024 16:39
clenfest pushed a commit that referenced this pull request Jan 24, 2024
This PR was opened by the [Changesets
release](https:/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to main, this PR will
be updated.


# Releases
## @apollo/[email protected]

### Patch Changes

- Updated dependencies
\[[`493f5acd16ad92adf99c963659cd40dc5eac1219`](493f5ac)]:
    -   @apollo/[email protected]
    -   @apollo/[email protected]

## @apollo/[email protected]

### Patch Changes

- Updated dependencies
\[[`493f5acd16ad92adf99c963659cd40dc5eac1219`](493f5ac)]:
    -   @apollo/[email protected]
    -   @apollo/[email protected]
    -   @apollo/[email protected]

## @apollo/[email protected]

### Patch Changes

- Additional `SourceSpecDefinition` validations and bug fixes
([#2914](#2914))

## @apollo/[email protected]

### Patch Changes

- Updated dependencies
\[[`493f5acd16ad92adf99c963659cd40dc5eac1219`](493f5ac)]:
    -   @apollo/[email protected]

## @apollo/[email protected]

### Patch Changes

- Updated dependencies
\[[`493f5acd16ad92adf99c963659cd40dc5eac1219`](493f5ac)]:
    -   @apollo/[email protected]
    -   @apollo/[email protected]

## @apollo/[email protected]

### Patch Changes

- Updated dependencies
\[[`493f5acd16ad92adf99c963659cd40dc5eac1219`](493f5ac)]:
    -   @apollo/[email protected]

## [email protected]

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
tninesling added a commit that referenced this pull request Feb 5, 2024
… directive (#2929)

# Overview

The recent addition of `SourceSpecDefinition` surfaced a case where a
subgraph with a `@link` to federation < 2.7 and a `@link` to the source
spec (which requires federation >= 2.7) results in an unexpected error
during composition. Validation for this case was introduced in
#2914, raising a
composition error when the versions are mismatched.

Since the existing behavior will implicitly upgrade to a later minor
version of federation when two subgraphs are mismatched, it makes sense
to do the same with feature requirements.

# Example

Subgraph A has a `@link` to fed version 2.5
Subgraph B has a `@link` to fed version 2.7
Subgraph C has a `@link` to fed version 2.5 and a separate `@link` to
the source spec

Previous behavior:
1. Composing Subgraph A and Subgraph B silently upgrades to fed version
2.7
2. Composing Subgraph A and Subgraph C results in a composition error

New behavior:
1. Composing Subgraph A and Subgraph B silently upgrades to fed version
2.7
2. Composing Subgraph A and Subgraph C upgrades to fed version 2.7 and
raises a hint explaining why

---------

Co-authored-by: Chris Lenfest <[email protected]>
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4 participants